(1) Stainless steel butt weld pipe fittings shall conform to,
(a) ASME B16.9, “Factory-Made Wrought Buttwelding Fittings”, and
(b) ASTM A403 / A403M, “Wrought Austenitic Stainless Steel Piping Fittings”.
(2) Stainless steel butt weld pipe fittings shall be made of a material that matches the grade of the pipe material used.